U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
|William G. Duguay, J.D. Abrams, L.P.
ACG of America
Current Market Conditions and their Effects on:
Will continue to drive:
Current market conditions makes transportation investment ideal, and how will ABC and PBES fit into this?
An estimated 146,000 bridges need work
Every Agency is strapped for funding, and are looking for:
146K number per TRIP, The NHS says the majority are less than 90 feet.
PBES can be a sole solution based on site constraints of some sort, access constraints or mobility concerns, and these may be more of a requirement than a desire.
What are some of the industry efforts under way to support PBES?
Major Markets served by the Heavy Lift Industry
Photo courtesy of Barnhart Crane/Hake Rigging.
Other Industries are used to moving modular units
Photo’s courtesy of Barnhart Crane
The Bay Bridge in San Francisco East Tie-in, segment skidded over on Labor Day 2009. Weight is 3,300 tons ea. Old piece out, new piece in. Old piece lowered 150 ft to the ground for demo. Courtesy Mammoet.
Old bridge demolished and new one skidded in. Road closure 1 weekend. There is a nice video of this one on the Oregon DOT website under the Redland rd Crossing Project. Courtesy Mammoet.
Done over Labor Day Weekend weight 6,500 tons. Old one demolished conventional way, new one skidded in. Photo Courtesy Mammoet.
Bridge weight around 2,100 tons. Installed with SPMT’s. Road closure from 10.00 PM until 06.00 AM Saturday Courtesy Mammoet.
Transport of typical mid sized elements using conventional equipment.
Mid scale PBES pieces using owned equipment and potential for self fabrication.
Photo Courtesy Michael Baker Corp/Granite Construction. CM/GC Design Build Riverdale Rd over I-84 Salt Lake City Utah. Small piece size, cast at the project, conventional equipment and techniques used for erection.
Photo courtesy Michael Baker Corp/Granite Construction CM/GC Design Build Riverdale Rd over I-84 Salt Lake City Utah.
Mill Street Bridge Epping New Hampshire designed and constructed using local resources.
HCB Bridge Elements erected using standard equipment
All the way to small scale light pieces where access, distance, remoteness or other constraints are present.
Photos courtesy HCB Bridge
Photos Courtesy Barnhart Crane
Proposed method courtesy Barnhart-Marino Crane/Hake Rigging.
The MMS (Moveable Scaffold System) underslung modular deck forming , span by span cast in place self launching form traveler, when there is insufficient room for casting yards or transport of segments is improbable. Photo Courtesy of Harsco Infrastructure Americas.
The MMS Over slung system, span by span cast in place self launching traveler, photo courtesy of Harsco Infrastructure Americas.
By working with Universities and assisting in research, Industry is exposed to the latest thinking and is on the ground floor with Academia, research organizations and the FHWA is finding new solutions to our transportation issues.
Working with a Highways for Life Contract, a simple footing detail was developed: "It has definitely been a team effort, with people from all the necessary disciplines actively involved" This included WSDOT, local AGC members and local engineering firms.
Photo courtesy of University of Washington newsletter "The Bridge". Quote from Professor John Stanton. Several different research focus topics have been successfully implemented, including a cap beam connection that is very easy to construct, a bridge bent system that uses unbonded pre-tensioned columns.
Lab testing of HCB beams, photo courtesy HCB Bridge, prototype being tested at the AEWC Lab at the University of Maine.
Photo courtesy SUNY Buffalo SEESL – Structural Engineering and Earthquake Simulation Laboratory.
Precast overhangs undergoing testing. Photo courtesy Austin Prestress, Texas A&M, Oklahoma Transportation Center and Tyler Ley, PE, Ph.D. – Assistant Professor, Oklahoma State University.
Photo courtesy Austin Prestress, Texas A&M, Oklahoma Transportation Center and Tyler Ley, PE, Ph.D. – Assistant Professor, Oklahoma State University Rock Creek Bridge, in Parker County just North of Cool, Texas.
Industry continually participates in outreach forums. These are large scale examples, but local projects like the Epping Bridge had multiple outreach sessions that industry participated in.
Adapt Delivery methods from other industries:
Manufacturing and Commercial Buildings version of ABC:
Many industries value time and quality over initial cost. Newer project financing options also stress delivery time and the opening of facilities to generate revenue.
Projects don’t need to be huge
Other perceived barriers
Each of these barriers can be resolved thru communicating the goals of the project
Maximizing the Delivery Process PBES can allow:
1) Bridge elements can be fabricated at a time convenient to the contractor instead of as dictated by the linear schedule of in place construction.
2) Working in and around traffic continues to be one of the most hazardous portions of highway construction for both the public, the Agency and the Contractor, working outside of the final location may minimize added congestion due to construction activities and lessen the economic impact to adjacent businesses.
3) PBES can reduce the truck traffic from deliveries in the work zone, move them to other project locations and smooth equipment and labor demands on the project.
4) Our Infrastructure when treated as an investment needs to last longer.
2nd: Our Industry Competes for Funding
How do we improve the highway system to a level of quality the public expects in a timely fashion?
The public’s perception of "timely" can be based on congestion caused by construction.
The Construction Industry, along with our engineering firms and vendors are working on PBES in many ways each and every day. We’re working hard to provide appropriate and innovative solutions to our transportation issues; and the AGC and our partners will continue to work to implement the best technology available to support the FHWA’s Every Day Counts Initiative.
AGC of America